Automatic control of integrated circuit trimming

Details Automatic control of integrated circuit trimming Automatic control of integrated circuit trimming

1977-12-15

1980-01-08

Tupman, W. C.

Metal working

Method of mechanical manufacture

Assembling or joining

29574, 29577R, 29584, B01J 1700

Patent

active

041820240

ABSTRACT:
In a monolithic integrated circuit having a combination of bipolar and junction field effect transistors, a pulsed laser is employed to trim the transistors to achieve balanced circuit performance. The laser is applied to individual circuits in wafer form using a step and repeat operation. Each circuit is measured, the transistor to be trimmed determined and a first trim performed. The circuit is remeasured and, if still out of specification, retrimmed. The process is repeated until a desired degree of balance is achieved.

REFERENCES:
patent: 3581385 (1971-06-01), Lathrop
patent: 3688389 (1972-09-01), Nakanuma
Solid State Technology, May 1969, "Laser Adjustable Resistors for Precision Mono, Circuits, by Braun & Breuer, pp. 56-62.
Industrial Lasers & Their Applications, 1974, Harry, McGraw-Hill, pp. 136-138.

Affiliated with

Also associated with

Rating

Automatic control of integrated circuit trimming does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic control of integrated circuit trimming, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic control of integrated circuit trimming will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1939092